Upgrade to 1.0 and switch clients to dom-repeat where needed.

third_party/polymer/v0_8/components/iron-menu-behavior/iron-menubar-behavior.html

+<!--
+@license
+Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+
+<link rel="import" href="../polymer/polymer.html">
+<link rel="import" href="iron-menu-behavior.html">
+
+<script>
+
+  /**
+   * `Polymer.IronMenubarBehavior` implements accessible menubar behavior.
+   *
+   * @polymerBehavior Polymer.IronMenubarBehavior
+   */
+  Polymer.IronMenubarBehaviorImpl = {
+
+    hostAttributes: {
+      'role': 'menubar'
+    },
+
+    keyBindings: {
+      'left': '_onLeftKey',
+      'right': '_onRightKey'
+    },
+
+    _onUpKey: function(event) {
+      this._activateFocused(event.detail.keyboardEvent);
+    },
+
+    _onDownKey: function(event) {
+      this._activateFocused(event.detail.keyboardEvent);
+    },
+
+    _onLeftKey: function() {
+      this._focusPrevious();
+    },
+
+    _onRightKey: function() {
+      this._focusNext();
+    },
+
+    _onKeydown: function(event) {
+      if (this.keyboardEventMatchesKeys(event, 'up down left right esc enter')) {
+        return;
+      }
+
+      // all other keys focus the menu item starting with that character
+      this._focusWithKeyboardEvent(event);
+    }
+
+  };
+
+  /** @polymerBehavior Polymer.IronMenubarBehavior */
+  Polymer.IronMenubarBehavior = [
+    Polymer.IronMenuBehavior,
+    Polymer.IronMenubarBehaviorImpl
+  ];
+
+</script>